256402412466 has 64 divisors (see below), whose sum is σ = 554052096000. Its totient is φ = 78847883136.

The previous prime is 256402412449. The next prime is 256402412489. The reversal of 256402412466 is 664214204652.

256402412466 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 946006 + ... + 1186478.

It is an arithmetic number, because the mean of its divisors is an integer number (8657064000).

Almost surely, 2^256402412466 is an apocalyptic number.

256402412466 is an abundant number, since it is smaller than the sum of its proper divisors (297649683534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256402412466 is a wasteful number, since it uses less digits than its factorization.

256402412466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240743.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 256402412466 in words is "two hundred fifty-six billion, four hundred two million, four hundred twelve thousand, four hundred sixty-six".